Roll film magazine container for photographic cameras



Jan. 16, 1940. FQLLOCK 2,187,547

ROLL FILM MAGAZINE CONTKINER FOR PHOTOGRAPHIC CAMERAS Filed June 1'7,1956 INVENTOR. Gordon B. Pollock ATTORNEY.

Patented Jan. 16, 1940 PATENT OFFICE ROLL FILM MAGAZINE CONTAINER FORPHOTOGRAPHIC CAMERAS Gordon B. Pollock, Los Angeles, Calif.

Application June 1'7,

g 2 Claims.

-My invention relates to roll film cartridges,

magazines, or containers intended principally to be used with small handphotographic cameras for holding a roll of raw film in cartridge form 5to be loaded into an appropriate chamber in a camera, which containermagazine will permit convenient manipulation of suitable lengths of filmto a position for receiving the photographic exposure, and which, afterthe exposure, will facilitate transfer of such light-impressed portionof the film to a similar and interchangeable container magazine.

It is an important essence of the present invention to utilize theinherent curling tendency of sensitized film caused principally by theemulsion on the Celluloid surface to cause the film, first, to hugclosely emulsion-surface-protecting and film-guiding rails of a curvedlight trap forming the entrance into the storagecompartment of themagazine container, thus permitting very small clearances through thelight trap without danger either of abrasion of the sensitized surfaceof the film or of undue friction of its edges with the guiding rails ofsaid entrance passage, and, second, upon reaching the storagecompartment, to resume ,its rolled conditiona1l without the use ofsprings to guide, or the usua spooling mechanism to roll. v

Of course, such automatic resumption by the film of rolled condition ontransfer to the receiving storage compartment of the container resultsin a looser roll; so that I contemplate that the raw film cartridgebefore being loaded into the container shall be sealed in a tighter andconsid- 36 erably smaller roll than necessary to fill the containerstorage compartment, thus allowing for an increase of diameter of there-rolled film caused by such looseness of such automatic rewinding.

.The magazine-container of the present inven- 40 tion is particularlydesigned for cameras of the construction of that illustrated anddescribed in my co-pending applications. N. 24,208, filed May 31, 1935,now Patent No. 2,129,959, for Camera, and is also an improvement uponthe film spool-container of my co-pending application, S. N. 35,801,filed August 12, 1935, contemplating, as it does, a mechanism formingpart of the camera for pulling the film from the raw film container andpushing it into the container for the exposed film. Some such means asthat illustrated and described in my said application, S. N. 24,208 forpropelling the film from one container to another is therefore impliedas necessary to the utilization of the present invention.

Another feature of the present invention of 1936, Serial No. 85,68'i

such importance as to justify preliminary emphasis, relates to the shapeof the slot through the outside of the container from or into the lighttrap. This is such as to allow an exceedingly small clearance for theedges of the film; 5 and by reason of the combination of pre-curling ofthe film to correspond to the conformation of the curved rails of thelight trap, and the notched ends of the film to permit guidance into thelight trap without buckling, a. minimum of clearance between thesensitized surface of the film and the light trap walls is alsopermitted, thus forming a very adequate light trap of the most simple,and consequently, economical construction. In this connection 'I remindthat the drawing, being '15 illustrative only, and not according toscale, greatly exaggerates, for the purpose of clarity, clearancethrough the light trap.

Principal objects of my said invention are the elimination of the filmspool, the protection of the sensitized surface of the film frominjurious abrasion at points of entrance into and exit from and throughthe light trap, by a simple and consequently economical constructionpermitting minute clearances, and eliminating interference with themovement of the film through the lighttrap and into the film receivingcompartment of the magazine container.

It is also an important object to utilize the natural tendency of thefilm to curl by comparar tively tight rolling as a means of enablingcompact storage in the receiving magazine container without the use of aspool, yet providing by a larger dimension than the diameter of theoriginal rolled film cartridge for a looseness of re-. rolling in thereceiving storage compartment 0 an exposed film magazine container.

Another object is to so form the outside end of film thatthemanipulative edges of the film are advanced ahead of the exposuresurface, to facilitate entrance of the body of the film into the lighttrap of a receiving magazine container/and thereby minimize tendency ofthe film to jam in the light trap. a

Still another object is to provide means for-' holding a film in smallerdimension than the inside of its container for the purpose of permittingthe film to be pushed into another like container with a minimum ofresistance and friction through a light trap, to conform to the shape--"5 of which, pre-curling of the film by tight rolling has contributed.

Other objects are to provide a neat, compact, easily manipulated,low-priced, film magazine, which not only will at all times protect allpor- L tions of the film from chance exposure-fogging, but which willprovide a light and moisture proof receptacle for storage of the filmboth before and after exposure.

Other objects and corresponding advantages will be apparent to those ofskill in this art upon an examination of the appended drawing anddetailed description to follow.

In the drawing:

Figs. 1 and. 2, respectively, represent outside end pieces of rolls offilm adapted for use in the magam'ne container of my invention, saidpieces of film showing the manner in which the outside end of the filmis preferably cut;

Fig. 3 is a. longitudinal section through the posed therein, partiallybroken away;

Fig. 4. is a section on line 4-4 of Fig. 3;

Fig. 5 is a side elevation of themagazine container of Figs. 3 and 4 ona reduced scale;

Fig. 6 is a longitudinal section similar to Fig. 3 but showing analternative construction of the means for preventing abrasion of theexposure surface of the film;

Fig. 7 is a horizontal section on line ll' of Fig. 6; I

Fig. 8 is a-reduced side elevation of the modified constructionillustrated in Figs. 6 and '7;

Fig. 9 represents the outside of a roll of film showing a means forholding the film in tightly rolled condition before threading throughthe camera and into the receiving container magazine.

Referring more particularly to the drawing throughout the several views,In designates an outer, approximately hollow cylindrical Walllongitudinally slotted parallel with its axis as indicated at H and,diametrically opposite said slot, and parallel therewith, beinglongitudinally embossed as indicated at l2 to form an interior groovel3. Said outer wall H! is also embossed ,onone side between slot I! andboss l2 as indicated at M, to provide clearance for the sensitizedsurface of the film, as later more specifically described.

A segmental portion l5 of an approximately cylindrical inner wall, whichis preferably formed of thin, slightly resilient material, such asbrass,is adapted to telescope within outer wall In, and is formed so that itwill fit snugly against approximately half of the inner surface of outerwall Hi. I

At 16 said wall is slightly offset inwardly so that continuing portionI! of said inner wall is spaced from the inner surface of outer wall In,thus leaving a segment 18 of annular space between the walls, comprisinga light trap passage.

19 indicates an outwardly extending radially disposed flange at one edgeof inner wall portion l5, which is adapted to slide into groove l3 inthe inner surface of outer wall 19, thus to hold all portions of saidinner wall-I5 in their intended assembled positions. Portion ll of saidinner wall is turned outwardly at the innermost end of the light trapand connected to the adjoining edge of flange IQ of said wall. Anentrance slot 20 is formed in portion l1 adjacent its joinder to flangeii! to connect the light trap passage I8 with the interior of thecontainer magazine for the passage of film therethrough.

Portion ll of said inner wall is embossed inwardly as indicated at 2! toprovide clearance space for the main portion of the film as it passesand parallel to said slot, a portion of said conthrough light trap spaceI8 toor from the central storage compartment of the container.

One end of the cylindrical container of my invention may be covered by aclosure plate 22 integral with the side walls In, and the other end 5 bya flanged cover 23 (as shown in Figs. 3 and 5) brazed, soldered, orotherwise secured in place, such means being well known in the art, or,as

illustrated in Figs. 6 and 8, both closure plates may be like thatindicated at 23. 10

In order that the edges of a film 24 being threaded through light trapspace 18 for take-up within an exposed film container magazine, may moreeasily enter the narrow spaces 25 and 26 between unembossed edges ofinner and outer 5 walls, outer ends of filmq24 are preferably cut asindicated at 2! and 28, Figs. 1 and 2.,

The curl of the film 24, assisted by tight rolling, is utilized withinthe interior of the container magazine to eliminate the necessity for 26any form. of spool, the film being held, until ready for use, in rolledposition either by a small amount of adhesive on the underside adjacentthe outer end of the roll of film and attaching it to the portion of theroll just beneath, which 2 adhesion may be easily broken, withoutsubstantial injury to the film, by the movement necessary to withdrawthe film from the container, or such rolled condition may be preserveduntil the film is ready for use by inserting the 13! tongues 28 cut infilm 24 into corresponding slots 30 cut in the edges of the film (asillustrated in Fig. 9).

In Figs. 6, '7, and 8 I have shown alternative means in a container 33for holding the film in centralized position to prevent abrasion whilepassing through the light trap, such means comprising a correspondingcrimping" adjacent the edges of the innerand outer walls as indicated at3| and 32, peaks of adjoining undulations be- 44 ing so spaced as topermit passing of the edges of the film 24 between them. I In thislatter embodiment the inner and outer walls are formed of one piece ofmaterial, an extension of the outer wall being spiralled within saidouter wall.

While I have shown and described what I believe to be a preferableembodiment of my invention, it will beobvious to all. of skill in thisart that relative dimensions may be changed and various equivalent meansmay be utilized 5 for providing an extended peripheral light trap andfor centralizing the filmv so as to prevent abrasion whilepassing'through the light trap.

While in Figs. 1 and 2 I have shown, respectively, triangularly andrectangularly notched ends of the film, it will be obvious that otherforms for cutting such outside end of the film, such as a U-shapednotch, could be substituted without change of function or effect.

In the following claims when I refer to notched w outer ends of thefilm, I mean any form of cutting which will advance the manipulativeedges of the film ahead of the exposure surface thereof; and when Irefer to pre-curled film, I mean film which has been impressed with atendency g to maintain its rolled condition, whether such tendency hasbeen created by previous relatively tight rolling or by any other means.1

What I claim-and desire to cover by Letters Patent is:

1. In a device of the character described, a hollow substantiallycylindrical container having a slot therein parallel to its longitudinalaxis and a groove in its inner surface spaced from tainer adjacent saidslot being outwardly embossed, a second cylinder telescoped within saidfirst cylinder, an indented portion of said second cylinder, a flange onsaid second cylinder engageable with said groove to maintain saidindented and embossed portions of said cylinders, respectively,adjacent, and a slot in said second ,cylinder parallel to its axis atthe end of said indented portion thereof spaced from said slot

